ELF loading via ERIS

by emery 3 years ago

GNU/Linux ◆ screen ◆ fish 667 views

GNU Hello running in Genode, in QEMU. The programs here have been ELF-patched to load their libraries by ERIS URNs, and the program images are referred to by ERIS URN.

The images are not broken down into encrypted chunks, rather they are retrieved by URN from a kernel key-value store for boot modules. In the future, this method may be used to bootstrap a program that performs ERIS decoding of requests, and fetches chunks from local or remote storage.

Patching is done via a Nix setupHook executed at the end of the stdenv builder script.

https://purl.org/eris

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You can download this recording in asciicast v2 format, as a .cast file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 395990.cast

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/395990.cast',
      document.getElementById('player'),
      { cols: 191, rows: 46 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't provide GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed, generate a GIF with the following command:

agg https://asciinema.org/a/395990 demo.gif

Or, if you already downloaded the recording file:

agg demo.cast demo.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.